The type of the elements in the source sequence.
An async-iterable sequence whose elements to apply the predicate to.
The options for a predicate for filtering, thisArg for binding and AbortSignal for cancellation.
A promise containing the index of the first element in the array that passes the test. Otherwise, -1.
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Returns the a Promise containing the index of the first element in the array that satisfies the provided testing function. Otherwise, it returns a Promise with -1, indicating that no element passed the test.